Nifi: Can I do mathematical operations on a json file values?
I have a JSON file as an input to a processor. Something like this:
"x" : 10, "y" : 5
Can I do mathematical operations on these values instead of writing a custom processor? I need to do something like
( x / y ) * 3
^ Just an example.
I need to save the result to an output file.
UPDATE:
This is my text in generateFlowFile processor:
X|Y
1|123
2|111
And this is my AVRO schema:
"name": "myschema",
"namespace": "nifi",
"type": "record",
"fields": [
"name": "X" , "type": "int",
"name": "Y" , "type": "int" ]
When I change the above types to string, it works fine but I cannot perform math operations on a string.
FYI, I have selected 'Use Schema Name Property' in Schema Access Strategy
apache-nifi
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
add a comment |
I have a JSON file as an input to a processor. Something like this:
"x" : 10, "y" : 5
Can I do mathematical operations on these values instead of writing a custom processor? I need to do something like
( x / y ) * 3
^ Just an example.
I need to save the result to an output file.
UPDATE:
This is my text in generateFlowFile processor:
X|Y
1|123
2|111
And this is my AVRO schema:
"name": "myschema",
"namespace": "nifi",
"type": "record",
"fields": [
"name": "X" , "type": "int",
"name": "Y" , "type": "int" ]
When I change the above types to string, it works fine but I cannot perform math operations on a string.
FYI, I have selected 'Use Schema Name Property' in Schema Access Strategy
apache-nifi
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
add a comment |
I have a JSON file as an input to a processor. Something like this:
"x" : 10, "y" : 5
Can I do mathematical operations on these values instead of writing a custom processor? I need to do something like
( x / y ) * 3
^ Just an example.
I need to save the result to an output file.
UPDATE:
This is my text in generateFlowFile processor:
X|Y
1|123
2|111
And this is my AVRO schema:
"name": "myschema",
"namespace": "nifi",
"type": "record",
"fields": [
"name": "X" , "type": "int",
"name": "Y" , "type": "int" ]
When I change the above types to string, it works fine but I cannot perform math operations on a string.
FYI, I have selected 'Use Schema Name Property' in Schema Access Strategy
apache-nifi
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
I have a JSON file as an input to a processor. Something like this:
"x" : 10, "y" : 5
Can I do mathematical operations on these values instead of writing a custom processor? I need to do something like
( x / y ) * 3
^ Just an example.
I need to save the result to an output file.
UPDATE:
This is my text in generateFlowFile processor:
X|Y
1|123
2|111
And this is my AVRO schema:
"name": "myschema",
"namespace": "nifi",
"type": "record",
"fields": [
"name": "X" , "type": "int",
"name": "Y" , "type": "int" ]
When I change the above types to string, it works fine but I cannot perform math operations on a string.
FYI, I have selected 'Use Schema Name Property' in Schema Access Strategy
apache-nifi
apache-nifi
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
edited Nov 19 '18 at 18:48
NoName
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
asked Nov 15 '18 at 0:26
NoNameNoName
3131418
3131418
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Use QueryRecord processor.
- Configure/enable Record Reader/Writer controller services
- Define Avro schema to
readthe incoming Json. - Define Avro Schema to
writethe results of query in desired format.
Add new property in the query record processor as
sql
select ( x / y ) * 3 as div from FLOWFILE
The output flowfile from the query record processor will be in the configured Record Writer format.
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
Thank you for the answer! I tried the same but I get an error when the field type is "int" in the schema. Error is : Failed to read next record in input for 'x' due to For input string:'x'. And this is happening only for type int or long. But if I change to string and have the sql asselct * from FLOWFILE, it works fine.
– NoName
Nov 17 '18 at 0:11
@NoName, I think the issue is coming withAvro Schema, please update your question withsample dataandReader/Writer Avro schemathat you are using now. So that i will try to help u to fix the issue...!!
– Shu
Nov 19 '18 at 14:41
I updated the question. Please take a look
– NoName
Nov 19 '18 at 18:48
@NoName, I tried with yoursample recordsand uploaded template here: github.com/shureddy/NiFiTemplates/blob/master/… upload this template to your instance and change the avro schema as per your case.
– Shu
Nov 19 '18 at 20:07
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Use QueryRecord processor.
- Configure/enable Record Reader/Writer controller services
- Define Avro schema to
readthe incoming Json. - Define Avro Schema to
writethe results of query in desired format.
Add new property in the query record processor as
sql
select ( x / y ) * 3 as div from FLOWFILE
The output flowfile from the query record processor will be in the configured Record Writer format.
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
Thank you for the answer! I tried the same but I get an error when the field type is "int" in the schema. Error is : Failed to read next record in input for 'x' due to For input string:'x'. And this is happening only for type int or long. But if I change to string and have the sql asselct * from FLOWFILE, it works fine.
– NoName
Nov 17 '18 at 0:11
@NoName, I think the issue is coming withAvro Schema, please update your question withsample dataandReader/Writer Avro schemathat you are using now. So that i will try to help u to fix the issue...!!
– Shu
Nov 19 '18 at 14:41
I updated the question. Please take a look
– NoName
Nov 19 '18 at 18:48
@NoName, I tried with yoursample recordsand uploaded template here: github.com/shureddy/NiFiTemplates/blob/master/… upload this template to your instance and change the avro schema as per your case.
– Shu
Nov 19 '18 at 20:07
add a comment |
Use QueryRecord processor.
- Configure/enable Record Reader/Writer controller services
- Define Avro schema to
readthe incoming Json. - Define Avro Schema to
writethe results of query in desired format.
Add new property in the query record processor as
sql
select ( x / y ) * 3 as div from FLOWFILE
The output flowfile from the query record processor will be in the configured Record Writer format.
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
Thank you for the answer! I tried the same but I get an error when the field type is "int" in the schema. Error is : Failed to read next record in input for 'x' due to For input string:'x'. And this is happening only for type int or long. But if I change to string and have the sql asselct * from FLOWFILE, it works fine.
– NoName
Nov 17 '18 at 0:11
@NoName, I think the issue is coming withAvro Schema, please update your question withsample dataandReader/Writer Avro schemathat you are using now. So that i will try to help u to fix the issue...!!
– Shu
Nov 19 '18 at 14:41
I updated the question. Please take a look
– NoName
Nov 19 '18 at 18:48
@NoName, I tried with yoursample recordsand uploaded template here: github.com/shureddy/NiFiTemplates/blob/master/… upload this template to your instance and change the avro schema as per your case.
– Shu
Nov 19 '18 at 20:07
add a comment |
Use QueryRecord processor.
- Configure/enable Record Reader/Writer controller services
- Define Avro schema to
readthe incoming Json. - Define Avro Schema to
writethe results of query in desired format.
Add new property in the query record processor as
sql
select ( x / y ) * 3 as div from FLOWFILE
The output flowfile from the query record processor will be in the configured Record Writer format.
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
Use QueryRecord processor.
- Configure/enable Record Reader/Writer controller services
- Define Avro schema to
readthe incoming Json. - Define Avro Schema to
writethe results of query in desired format.
Add new property in the query record processor as
sql
select ( x / y ) * 3 as div from FLOWFILE
The output flowfile from the query record processor will be in the configured Record Writer format.
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
answered Nov 15 '18 at 1:08
ShuShu
4,8212519
4,8212519
Thank you for the answer! I tried the same but I get an error when the field type is "int" in the schema. Error is : Failed to read next record in input for 'x' due to For input string:'x'. And this is happening only for type int or long. But if I change to string and have the sql asselct * from FLOWFILE, it works fine.
– NoName
Nov 17 '18 at 0:11
@NoName, I think the issue is coming withAvro Schema, please update your question withsample dataandReader/Writer Avro schemathat you are using now. So that i will try to help u to fix the issue...!!
– Shu
Nov 19 '18 at 14:41
I updated the question. Please take a look
– NoName
Nov 19 '18 at 18:48
@NoName, I tried with yoursample recordsand uploaded template here: github.com/shureddy/NiFiTemplates/blob/master/… upload this template to your instance and change the avro schema as per your case.
– Shu
Nov 19 '18 at 20:07
add a comment |
Thank you for the answer! I tried the same but I get an error when the field type is "int" in the schema. Error is : Failed to read next record in input for 'x' due to For input string:'x'. And this is happening only for type int or long. But if I change to string and have the sql asselct * from FLOWFILE, it works fine.
– NoName
Nov 17 '18 at 0:11
@NoName, I think the issue is coming withAvro Schema, please update your question withsample dataandReader/Writer Avro schemathat you are using now. So that i will try to help u to fix the issue...!!
– Shu
Nov 19 '18 at 14:41
I updated the question. Please take a look
– NoName
Nov 19 '18 at 18:48
@NoName, I tried with yoursample recordsand uploaded template here: github.com/shureddy/NiFiTemplates/blob/master/… upload this template to your instance and change the avro schema as per your case.
– Shu
Nov 19 '18 at 20:07
Thank you for the answer! I tried the same but I get an error when the field type is "int" in the schema. Error is : Failed to read next record in input for 'x' due to For input string:'x'. And this is happening only for type int or long. But if I change to string and have the sql as
selct * from FLOWFILE , it works fine.– NoName
Nov 17 '18 at 0:11
Thank you for the answer! I tried the same but I get an error when the field type is "int" in the schema. Error is : Failed to read next record in input for 'x' due to For input string:'x'. And this is happening only for type int or long. But if I change to string and have the sql as
selct * from FLOWFILE , it works fine.– NoName
Nov 17 '18 at 0:11
@NoName, I think the issue is coming with
Avro Schema, please update your question with sample data and Reader/Writer Avro schema that you are using now. So that i will try to help u to fix the issue...!!– Shu
Nov 19 '18 at 14:41
@NoName, I think the issue is coming with
Avro Schema, please update your question with sample data and Reader/Writer Avro schema that you are using now. So that i will try to help u to fix the issue...!!– Shu
Nov 19 '18 at 14:41
I updated the question. Please take a look
– NoName
Nov 19 '18 at 18:48
I updated the question. Please take a look
– NoName
Nov 19 '18 at 18:48
@NoName, I tried with your
sample records and uploaded template here: github.com/shureddy/NiFiTemplates/blob/master/… upload this template to your instance and change the avro schema as per your case.– Shu
Nov 19 '18 at 20:07
@NoName, I tried with your
sample records and uploaded template here: github.com/shureddy/NiFiTemplates/blob/master/… upload this template to your instance and change the avro schema as per your case.– Shu
Nov 19 '18 at 20:07
add a comment |
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